Considering a new TIG welder? Before you part with your hard earned, there are important and key points to know first. Transformer or Inverter Until 2005 Tig Welder transformer machines were very common in the new machine market and due to their limitations in control and weight have been replaced by modern inverter welder products. Transformer machines would step down the primary input, either 240V single phase or 415V 2 / 3 phase to a lower voltage welding current. The output of the transformer would then either be rectified […]